Dozens of eyewitness accounts and a few intriguing photographs suggest that this flying monster, thought to have died with the dinosaurs, might still exist.

They were the largest creatures to ever attain flight. With wingspans reaching nearly 40 feet, pterosaurs ruled the prehistoric skies for over 100 million years, until they died out with the dinosaurs about 65 million years ago.

Or did they? (momento dramático - tcham-tcham-ram-ram!!)

There have been many modern-day sightings of creatures that by eyewitness description sound like pterosaurs. There are also intriguing rock carvings and even photographs that suggest that this species of amazing flying monsters could have survived extinction, could have soared through the skies of the southwestern United States until very recently, and might still exist in small numbers in remote parts of the world.

Pterosaurs were not dinosaurs, but a family of large flying reptiles ("pterosaur" means "winged lizard") that includes the pterodactyl and pteranodon. The pterosaur stood on two rather spindly legs and had wings composed of a leathery membrane that stretched from the animal's extremely long fourth finger to its body. Despite their appearance, they were not related to birds (as dinosaurs are theorized to be), and were highly successful flyers that might have dined on fish and insects.